Otdfbt

We're attempting to setup an AKS proof of concept to see if docker/kubernetes is a viable alternative to our current virtual server environment. We use ColdFusion on the backend which is able to process dynamic files and pass them as html to a client over http on port 8500. We would like to use Apache that we can take advantage of some of its features, especially mod_rewrite. So my initial impression is that we would setup the following pods:

1x Redis for session datastore

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 ^ ^ ^

1+ x ColdFusion / Tomcat

 ^ ^ ^
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1 x Apache

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1 x Kubernetes Load Balancer

I assume that there is some way to have Apache accept requests on port 80. For each such request apply rewrite rules and then pull html from Tomcat, which is then passed directly on to the client.

So far we've setup a simple test environment using this yaml:

 apiVersion: apps/v1beta1
 kind: Deployment
 metadata:
 name: cfsample
 spec:
 replicas: 1
 strategy:
 rollingUpdate:
 maxSurge: 1
 maxUnavailable: 1
 minReadySeconds: 5 
 template:
 metadata:
 labels:
 app: cfsample
 spec:
 containers:
 - name: cfserver
 image: pmcomcfacr.azurecr.io/coldfusion:v1
 ports:
 - containerPort: 8500
 volumeMounts:
 - name: code
 mountPath: /app
 resources:
 requests:
 cpu: 250m
 limits:
 cpu: 500m
 env:
 - name: acceptEULA
 value: "YES"
 - name: password
 value: "cfPW123"
 - name: configureExternalSessions
 value: "true"
 - name: externalSessionsHost
 value: "cfredis"
 - name: externalSessionsPort
 value: "6379"

 - name: cfredis
 image: redis:latest
 ports:
 - containerPort: 6379
 volumeMounts:
 - name: redis
 mountPath: /redis-master-data

 - name: cfapache
 image: httpd
 ports:
 - containerPort: 80

 imagePullSecrets:
 - name: registrycreds
 volumes:
 - name: code
 azureFile:
 secretName: azure-secret
 shareName: code
 readOnly: false
 - name: redis
 azureFile:
 secretName: azure-secret
 shareName: redis
 readOnly: false
 ---
 apiVersion: v1
 kind: Service
 metadata:
 name: cfsample
 spec:
 type: LoadBalancer
 ports:
 - name: "coldfusion"
 port: 81
 targetPort: 8500
 - name: "apache"
 port: 80
 targetPort: 80
 selector:
 app: cfsample

This works both for hitting Apache at http://[IP]/ and ColdFusion at http://[IP]:81/ . What flags or configuration variables do I pass to Apache within this yaml file to have that pod pass requests through to ColdFusion, and then return the results to the client? Or is this a more complicated setup that needs steps outside a simple script?

As an aside: We would like to be able to easily pull the latest images for these services, so we are trying to avoid building a custom image which would need maintained and updated.